• Apr 15, 2019

  • Supercontest
  • Ansible
  • Falls back on paramiko (python) if openssh fails.
  • Setup
  • sudo apt install ansible (this gives ansible-playbook and others)
  • added southbaysupercontest.com to /etc/ansible/hosts
  • ssh-agent bash
  • ssh-add ~/.ssh/digitalocean
  • ansible all -a “/bin/echo hello”
  • A lot of ansible’s power used to be the composition of various microservices, which docker-compose is a much simpler alternative for. It still has relevance in fleet management, however, and that’s what I’ll use it for.
  • Refamiliarized myself with their documentation.
  • I could just write a shell script to ssh, git pull, run the make target for docker-compose, then rsync dump files back and forth, but I’m gonna use ansible just for fun. It will enable scaling, load balancing, and more later (if need be).
  • Added playbooks to deploy the whole app remotely from local, as well as backup and restore the db. You simple enter through a oneliner make call, which farms out to ansible (which goes back and calls other make recipes).
  • Closed ticket #10.
  • Did a few test deploy/backup/restore operations between my laptop and the production server.
  • Upgraded docker-compose to 1.24 on southbaysupercontest.com. The py apt version was installed.
  • Unittests
  • Looks like there’s some nginx testing capability: https://github.com/nginx/unit/tree/master/test.
  • The module for a temp postgres db is: https://pypi.org/project/testing.postgresql/.
  • There are some docker unittest frameworks as well, but because it’s a generic tools, the test capabilities are generically shallow: https://github.com/GoogleContainerTools/container-structure-test.
  • Chromedriver
  • Tested the linefetching capability in the docker container. There were holes.
  • libnss3 was necessary for chromedriver.
  • You also need the chrome binary. Added.
  • Couldn’t verify end-to-end without some spoofing, because westgate has no lines during the offseason.
  • Here is another awesome script: https://gist.github.com/ziadoz/3e8ab7e944d02fe872c3454d17af31a5. If I have any problems at the start of the 2019 season, I can just add that to app/Dockerfile.
  • You can’t band-aid a poor engineering decision with software: https://www.youtube.com/watch?v=H2tuKiiznsY.
  • To rebalance panes in tmux so they’re equally spaced, used ctrl-b then alt-1 (vertical) or alt-2 (horizontal).
  • Python 3 natively keeps command history across interpreter sessions (like ipython does). Very convenient.